Combination swivel and bull hook



L. K. SYRSTAD.

COMBINATION SWIVEL AND BNLL HOOK.

APPLICATION FILED FEB-1,1922.

Patented Aug.-22, 1922. K

LOUIS K. sYRs'rAn, or 'sHEL'roN, WASHINGTON. I

COMBINATION SWIVEL Aivn Bonn HOOK.

Specification of Letters Patent. Patefited Aug, 1922,

Application filed February 1, 1922. Serial no. 533,436. 7

in hooks and particularlyto hooks used in logging and known as a combined swivel and bull hook.

An object of the invention is to provide a swivel hook havinga pivoted arm for preventing an element engaged in the hook from becoming accidentally disengaged and at the same time reinforcing the hook struc-' ture and equalizing the strain on the swivel portion.

Other objects and the details of construction are particularly pointed out in detail in the following description and claim.

In the drawings Figure 1 is a side view of the hook.

Figure 2 is a side view taken at right angles to Figure 1.

Figure 3 is a sectional view taken on line 3-3 of Figure 1. i

Figure 4 is a sectional view taken on line 4-4 of Figurel.

The improved hook comprises a base portion 1 having the hook portion 2 formed integral therewith at one end and curved at the lower end as shown in Figure 1. The baseportion is formed with a bore 3, which receives the shank 4 of the swivel'formed with an eye 5 and a head portion 6 for securing the swivel to the hook.

The free end of the base" member 1 bifurcated, as indicated at '7, one side being formed with a transverse opening- 8 communicating with the. bifurcation 7 and a depression. 9 surrounds the opening 8, the purpose of which will presently appear.

An arm 10 is pivoted to the end of the hook at 11, the outer free end of which is formed with a head 12, so that the arm will fit in the bifurcated endof the base portion and the head 12 will extend above the base and carry the strain on this side of the hook as will be obvious from Figure 1. The arm 10 is formed with a recess 13 adapted receive a spring 14 which issecuredat 15 to the arm and carries a button 16 on its free end adapted to project through the opening 18 in the arm into the opening 8 for hold-z ing the arm in closed position. The end portion of the base is formed with a longitudinal groove in the bifurcation as shown I at 19 so that the button may be pressed into the arm and the arm then moved outwardly into open position.-

-The depression 9 extends-practically 1 through the bifurcated arm as shown so. that a person may use their finger for pressing the button into the'arm suficientlythat it canride into the groove 19. illustrated in Figure 4. p

It will be noted that when the hook is in use the strain is evenly distributed through both arms of the hook, that is the integral This is clearly part 1 and the pivoted arm 10 to the base-f portion 1; This will {prevent a twisting strain on the shank 4 and an-eXcess strain onone side of the head 6 which occurs in the ordinary hook. The head 12 carries all the pull transmitted through the arm 10to the base portion, the button serving only to retain-the arm inclosed position in the bifurcatedend of the base What I claim is I A. hook including a base portion, anfeye as shown. I

swiveled in the base portion, a hook portion extending from the base portion and integral therewith at one end, 'the free end of the base portion being bifurcated, an arm pivoted to the end of the hook portion and formed at its free end with a head, said arm fitting in the bifurcation in the base portion and the head thereon overlying substantially the whole of the free end. of the base, and a spring, pressed latch carried by the arm for engagement in an opening in. the end por: tion of the base for locking the arm in cooperative relation with the base. 7

In testimony whereof I afliX my signature inthe presence of two witnesses.

LOUIS K. SYRSTAD.

Witnesses ALDEN C. BAYLEY, L. G. FREnsoN. 

